Update 2/1/2015: Realized I didn't make this review very objective. Edited it to be more rounded with better reasoning to my decisions and experience with the game. I want a reader to have a fair understanding of the game before they play/purchase. Hopefully this review can more effectively do that now.
-The controls for this game are in spite of the player. The camera pans in different directions and, despite some maneuverabilit, the player really has absolutely no control over 75% the time. Occasionally looking around is possible in open areas, but it'll easily be redirected in combat, or when you get into areas--like hallways or corners--where it forces you into one specific view point.
-Combat in the game acted more like a mobile app than an intuitive combat experience. Very much a button-mash experience using plain combos of click-click-click-other click.
-Inventory is difficult to shuffle through in combat when you have more than a few items. Two types of shuriken, two bombs, and the specialty weapons all filling the same slot, and only one key in one direction to alternate through, meant I was generally ignoring most of my inventory. Ideally, one could set each turtle with a different item, but if I wanted to toss a bomb in one direction and eat a pizza before going to a specialty weapon (as an example), I'd be bouncing around endlessly.
-In general exploration, I would have often preferred NOT having the other three turtles present throughout the game. I find they often get in the way. I had many experiences with them blocking doorways or alleys that forced me to switch to a different character in order to move beyond.
As an example to the presence of the other turtles: There's a point in the game where you're running an obstacle course. When your brothers fall behind, you'll get a puff from a smoke bomb that has the game replacing them next to you (this was my experience, at least). When trying to make it through the course, I would continually get smoke bombed and blockaded by another turtle. In this instance that one or two second stop meant failure, and became frustrating. I found this feature overall difficult and unwanted. I could have easily preferred an option to shut it off. Even when telling the others to "stay here," after a certain range, the game auto-moves them to meet the player.
-Lack of Sandbox option.
-No Jump (What kind of Ninja can't Jump?)
-Glitches in the Game. Certain areas are tied to timers that force a player to wait before advancing based on a predetermined expectation for defeating a set number of enemies. This occurred to me at least two or three times, and in one area I reset the game three times believing it to be a glitch. Turtles will get stuck in the geometry/surroundings a lot, player too.
-The Art Direction of the game is fantastic. The turtles are not quite what I'd have hoped them to be from a game being produced through Nickelodeon given the design of the current-set on air. The realistic looks are a sort-of cross between the animated turtles, and the TMNT live-action from 2014. Real-looking, but without the excess junk, and physically similar to that animated ones in body proportions.
-The world is well thought out, a real chunk of New York City. Plenty to look at eye-candy wise, but don't hold your breath because it's no sandbox. Expect invisible barriers all over.
TMNT is a piece of my childhood that I love, and I've played the games as far back as NES/Gameboy. This one was a real let down in terms of performance. This could have been a fantastic sandbox, but the inability to even Jump let me know I probably wasn't going to enjoy the game. From the lackluster combat, poor camera, continual timer delays witholding zone progression, and being stuck within the geometry often, I couldn't continue playing the game.
No amount of nostalgia could win this for me. At best, I'd give it 4/10. Time to take it back into the shadows.